PTP_CHDK_S_MSGTYPE_ERR  403 core/ptp.c       ptp_script_msg *msg = ptp_script_create_msg(PTP_CHDK_S_MSGTYPE_ERR,errtype,strlen(err),err);
PTP_CHDK_S_MSGTYPE_ERR  144 modules/luascript.c                     msgtype = PTP_CHDK_S_MSGTYPE_ERR;